quadrajet-cam

See 1976 Chevrolet pickup with Rochester quadrajet upgrade on SBC 350 V8. We removed the hood, mounted a camera looking down on the air horn, and took it for a spin, running wide open on an uphill grade. See how the secondary air valve responds to rpm drop at each upshift of the THM. Also included is a smoking burnout.

Quadrajet air leak fix and warped air horn repair tutorial.
How to identify a Quadrajet with a warped air horn without diss assembly or
running it on a car. These tips would have saved me time and money which is
why I made this video. I also discus how to repair a warped air horn and
prevent your air horn from warping in the first place. If you have a
whistling noise just off idle then you got some work to do. You will never
get your engine tuned right, your cold start performing or decent fuel
economy unless your four barrel carburetor is just right. Special thanks to
Cliff Ruggles for his book Rochester Quadrajet carburetors and to my
brother Adrian who spent hours on tuning and fitting.
See this video for description of the technique I used to straighten a
warped air horn.
http://www.youtube.com/watch?v=l_SgQiVf3_0&feature=youtu.be
here is a technique for re-bushing the throttle shaft without drilling.
http://rmcavoy.freeshell.org/Q_Jet_bushings.html

The Quadrajet to Edelbrock carburetor swap - step by step
Replacing my old Rochester Quadrajet with an Edelbrock 1406 carburetor.
This is a 1984 Chevy K20 3/4, just a yard truck for plowing my property.
The old Quadrajet got gunked up from a broken fuel filter so I decided to
try swapping on this old Edelbrock. I had pulled this Edelbrock off an El
Camino with a 305 I had about 10 years ago and it has been sitting since.
I popped the top and cleaned the inside, also flushed the passages with
carb cleaner. Seems to run well.
The Edelbrock 4bbl is not a direct bolt on to the stock intake manifold.
It has a slightly wider bolt pattern and the shape of the openings is
different. To facilitate installation I bought the Edelbrock adapter kit
model 2696 which was less than $30. It includes the adapter plate, two
gaskets, and mounting hardware.
I also purchased for about $8 the Edelbrock 8009 throttle cable adapter kit
which allows the stock GM throttle cable to interface easily to the
Edelbrock caburator armature.
The biggest adaption here was the fuel line. The Rochester Quadrajet has
the fuel filter in the the front of the carburetor and is fed by a metal
fuel line that threads in there. The Edelbrock's fuel inlet accepts a
rubber line and is on the side towards the rear. I cut my metal fuel line
and attached a rubber line to it with an inline fuel filter to the
Edelbrock 1406. This seemed to work very well.
I had to extend my PCV hose about an inch. This was easily done by cutting
it and splicing with a piece of metal tubing. The brake Booster vacuum line on the rear of both carbs
is identical and required no modification. Same with the distributor
vacuum advance, same location on both carburetors.
Parts Used:
Edelbrock 2696 adapter plate kit
Edelbrock 8009 throttle cable adapter
Rubber fuel line
Inline fuel filter
Hose clamps
Tools:
Flat head screwdriver
Phillips screw driver
5/8" tubing wrench (fuel line and brake Booster fitting)
1/2" wrench (carb mounting bolts)
3/4" wrench to swap brake Booster
fitting
Something to cut fuel lines with